Balancing device for sifters.



H. W. GLADHILL.

BALANCING DEVICE FOR SIFTERS. APPLICATION FILED JMLG, 1912.

1,045,694. Patented Nov. 26, 1912.

i l 1 P J I 4 I i HARVEY W. GLADHILL, 0F CHAMBERSBURG, PENNSYLVANIA.

BALANCING DEVICE FOR SIFTERS.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed January 6, 1912. Serial No. 669,800.

To all whom it may concern:

Be it known that I, HARVEY W. GLADHILL, a citizen ot the United States, residing in Chambersburg, county ot Franklin, State ot Pennsylvania, have invented certain Improvements in Balancing Devices tor Sitters, of which the tollowing is a specification.

My invention relates to certain improvements in sitters in which the sitter casing is suspended, and the driving mechanism is flexibly connected to the means tor giving the casing the desired mot-ion.

The object ot my invention is to provide means tor balancing the sitter, and this object I attain by mounting the base ot the driving mechanism on a sub-base on which it may have a slight rocking motion, as fully described hereinafter, reterence being had to the accompanying drawing, in which Figure 1, is a vertical sectional view of a sitter illustrating the driving mechanism in section; Fig. 2, is a sectional plan View on the line 22, Fig. 1; Fig. 3, is a sectional View ot a modification; and Fig. 4:, is a sec tional plan view on the line 1-i, Fig. 1.

The driving mechanism tor the sitter illustrated in the accompanying drawing is fully set torth and claimed in an application for patent filed by me on the first day of March, 1910, under Serial No. 546,609, and, therefore, I lay no claim to the particular construction of this driving mechanism; the present invention relating particularly to the balancing feature at the base ot the machine.

A is the sitter casing having arms a, a, in which are the bearings a tor the crank shatt B. The crank ot the shatt is elongated and is mounted in both bearings. Secured to the crank ot the shatt between the bearings are adjustable weights G attached to the shatt by screws 0. The lower end b of the shatt is in line with the driving shatt D, which is adapted to bearings d, cl in the standard E.

On the end of the shatt B is a ball 6 adapted to a socket cl in the end ot the shatt D, and secured to the upper end of the driving shatt D is a casing D in which is mounted the connecting collar F having arms f, and the collar is slotted at right angles to these arms to accommodate the lower end 6 ot the shatt, so that while the crank shatt must turn with the driving shatt, it is tree to assume a position at an angle to the driving shatt without affecting the driven or the driving mechanism, as it will be understood that the standard E is located on the floor and in most instances the casing is suspended trom the ceiling.

It is very difficult to aline the floor and the ceiling of a building or to prevent the vibration 0t one independently of the other, but by making the connection between the driving shatt and the crank shatt in the manner set torth, the parts run smoothly and without the usual jar where one is out of balance with the other. This is fully set torth and claimed in the above mentioned application.

I is a sub-base mounted under the base E of the standard E, and adapted to a socket i at the center of this sub-base is a ball a which enters a socket m in a plate M secured to the underside ot the standard E. This ball is in direct line with the center ot the driving shatt D. Near the periphery of the base is a series of holes 2" through which bolts S extend, and these bolts also "extend through openings 6 in the base E ot the standard E, and on these bolts are springs s confined between the upper surtace S ot the standard and a washer s and a nut t on the bolts. The springs tend to keep the standard in an upright position in respect to the sub-base, but it the standard has a tendency to assume a position other than a vertical position, then the springs on the side opposite to the pull will yield to assume the position momentarily and return the standard to its normal position immediately it is tree. Thus the ma chine will be prevented trom imparting a Vibratory motion to the building in which it is mounted. The sub-base can either have a socket to receive the ball, as illustrated in Fig. 1, or the ball, as shown at n, Fig. 3, can torm part of the sub-base I.

On rotating the crank shatt- B by the main driving shatt D it will make the driving shatt take an angular position out of axial: position with the crank shatt; the weights C will maintain it in that position until the machine has attained its normal speed, at which time, it the balance of the parts is perfect, it will be returned to its normal position by the springs s, and held there by the tension of said springs. In the present instance, a driving pulley Gr is mounted on the shatt D or on an extension ot the casing D on the shatt, and by placing more tension on the springs s, on the side of the base directly opposite from the direction in which the driving belt pulls, the influence of the belt is counteracted. If it is desired to use the machine with a rigid base, all that is necessary is to place split washers around the bolts S between the sub-base and the base E, and on screwing down the nuts 25 all flexibility of the springs s is taken up.

I claim l. The combination in driving mechanism for sifters, of a fixed sub-base; a standard pivotally mounted on the sub-base; springs tending to retain the standard in a vertical position; a vertical driving shaft mounted sub-base; a ball and'socket joint between the on the standard; a suspended sifter casing; bearingsthereon; a crank shaft adapted to the bearings; the end of the crank shaft resting on the driving shaft and flexibly connected thereto.

2. The combination of a sub-base having a socket; a standard having a central socket alining with the socket in the sub-base; a ball mounted in the said sockets and supporting the standard, said standard having a base; a yielding connection between the sub-base and the base of the standard; and a driving shaft mounted in the standard.

3. The combination of a sub-base; a standard having a base and mounted above the ing through the openings; springs mounted on the bolts above the base of the standard; nuts on the bolts; and a driving shaft mounted in the standard.

4. The combination of a fixed sub-base; a standard having a base extending over the sub-base; a ball mounted in the sub-base and centrally supporting the standard; a series of springs carried by the sub-base and resting on the base of the standard so as to yieldingly connect the standard to the subbase; a vertical driving shaft on the standard; a casing; bearings thereon; a vertically arranged crank shaft adapted to the bearings; and means for suporting the casing independently of the driving shaft; with a ball and socket connection between the crank Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

